python雜記-3(購買商品)，python-3

python雜記-3(購買商品)，python-3

#!/usr/bin/env python
# -*- coding: utf-8 -*-

#如下是一個購物程式：
#先輸入工資，顯示商品列表，購買，quit退出，最後格式化輸出所買的商品。
count = 0
while True:     #做一個迴圈判斷,如果輸入的不是數字，基於提示，三次後退出
    salary = input("input your salary:") #輸入你的工資
    if salary.isdigit():  #輸入的工資必須是數字才能往下走
        salary=int(salary)  #轉換為整數型
        break
    else:
        print("Please input a number:")
        count += 1
        if count == 3:
            exit()

goods_list = [["Iphone",5800],["Macbook",12800],["iMac",15000],["ApplePen",500],["IPod",1200]]  #商品列表
shop_list = []  #購買的商品列表
msg = " Product List "
print(msg.center(30,"*"))
for i,ele in enumerate(goods_list): #遍曆序列中的元素以及它們的下標
    print(i,".",ele[0],ele[1])
while True:
    choice = input("Which do you want(quit type \"quit\")>>>")
    if choice.isdigit():   #判斷選擇的是否是數字
        choice = int(choice)   #轉換為整數型
        if choice <= len(goods_list)-1:  #選擇的數字必須小於列表長度-1，因為下標從0開始
            if salary >= int(goods_list[choice][1]):  #判斷工資是否夠
                shop_list.append(goods_list[choice])  #夠的話，把商品加入到shopList
                salary -= goods_list[choice][1]  #減去工資
                print("You just buy a %s now you have %s RMB" % (goods_list[choice][0],salary))
            else:
                print("Not enough money")
        else:
            print("There is no such things")
    elif choice == "quit":
        print("Here is what you buy:")  #這裡的思路是，建立一個字典，把所買的商品格式化輸出
        total = 0
        shop_dict={}
        for item in shop_list:
            things = item[0]
            money = item[1]
            total += int(money)
            if things in shop_dict:
                shop_dict[things][0] += 1
                shop_dict[things][1] += money
            else:
                shop_dict[things]=[1,money]
        for item in shop_dict.items():
            print("%s  %s個  共%s" % (item[0],item[1][0],item[1][1]))
        print("一共花了:",total)
        exit()
    else:
        print("Please input a number")
        continue